How is this design, and what have i drawn??

[gclg2000]

I'm still trying to learn about how this stuff works. I've built a chiller and i'm fixing to start trying to build one of these. I have all the tools needed and a hookup on the proper types of freon required.

Did i just draw a 2 stage cascade cooler??? Please help me out with whats wrong with it.

i'm assuming this is how you can just loop compressor's together to make these awesome coolers.

http://www.namike.com/albums/album02/Phase_blueprint.sized.jpg

[gclg2000]

bump

[bh2k]

a very basic one, yes. but you'll be alot more parts then that

[craig588]

You probably want an oil seperator depending on your 2nd stage gas.

You need to have a suction line from the evap going to the accumulator.

You need driers too, put them before the cap tube.

I hope you just accidentally labeled that section an evap on the 2nd stage, you can just use a straight tube, and the section definatly is not an evap.

I don't think you need an accumulator on the 1st stage, at least I have never used one there.

[gclg2000]

is that right for the 2nd evap, capillary and return suction line for the CPU block??

Where should the oil seperator and driers????? Where are links to more info about these parts at?? Could you draw on the pics for me and show me?

http://www.namike.com/albums/album02/Phase_blueprint2.jpg

[cold_ice]

Why you don't look into the stickies? For example this thread: http://xtremesystems.org/forums/showthread.php?t=35385
There are complete drawings of different cascade types

[masterofpuppets]

You have drawn a very simple cascade. And some stuff is missing from it. As cold_ice said, read all the stickies page by page! Believe me, you will learn alot.

[gclg2000]

ok guys. I think i understand now. I've been reading the help threads before and now its finally "clicked." Please tell me if i'm right.

1.) The Heat excahnger "is just" the 1st loop's evaporator with the 2nd loops condensor inside it, submerged into freon of a "lower" temp like R22. Right????

Why would i need to add a HX anywhere else in the loop?

2.) The oil seperator is just to help filter out any oil that can get up into the evap/suction line of the 2nd loop since your using a colder freon....just a expanded tube with like copper/wire mesh inside it....kinda like a distiller tube.....Right????

3.) Is the pic below (additions of the one above) now almost fully correct???

http://www.namike.com/albums/album02/Phase_blueprint3_001.jpg

[Scout255]

in order to actually have oil recirculate in the system, you will need a way to remove oil from the oil seperator and return it to the suction line. It seems most use a solenoid valve and a tube hooked up from the oil seperator that leads into the suction line. This way, every few hours they crack the valve to reciculate whatever ammount of oil is in the sperator.

as far as i know, usually an oil seperator is vertical (i.e it stands up straight rather than lieing down on it's side sorta thing). This allows gravity to assist in the seperation.

[gclg2000]

Fixed it. I think i understand most of the "orientation," of the loops. I just want to make sure for now i have the "basic" design down and understand what each part does.

But also, does the capillary tube leading to the evap. block need to start "exactly" at the end of the oil seperator and then the suction line from the block back to the 2nd stage accumulator?

Like this instead....

http://www.namike.com/albums/album02/oil_sep_cap.jpg

[saratoga]

Is your evap really shorted straight into the accumulator? If so, thats going to make it hard to get any refrigerant into the evap.

1.) The Heat excahnger "is just" the 1st loop's evaporator with the 2nd loops condensor inside it, submerged into freon of a "lower" temp like R22. Right????


Well R22 is not a low stage refrigerant, so you wouldn't use that. Something like CO2 or Ethelene are more common around here, but I don't know much about them.

Edit: Just saw your pic. Yes you don't want to bypass the evap, otherwise you won't get flow through it. The length of the cap tube is important, you need to size it depending on your refrigerant and heat load. It may or may not run all the way to the seperator depending on the proximity of your parts.

[gclg2000]

So far..this is what i'm at for the basic lay out of the design.....I still need to research/understand how to figure out the length's of certain tubs, capillaries and etc...based upon load is what i'm assuming.

1) What are the ideal gases to use on the 1st stage??? CO2....R22...etc..?
2) What are teh ideal gases to use on the 2nd stage??? RXXX ?????

http://www.namike.com/albums/album02/Phase_blueprint5.jpg